BTS DATA COMPLETE THROUGH JUNE 2026HISTORICAL ODDS · NOT LIVE FLIGHT STATUS
DelayOddsKnow the route before you book
FLL→ISP

Fort Lauderdale, FL (FLL) to Islip, NY (ISP) flight delay odds

72.8% of 393 official scheduled FLL-to-ISP flights arrived on time; 16.3% arrived at least 30 minutes late and 2.0% were cancelled during July 2025–June 2026.

Source: U.S. Bureau of Transportation Statistics · Reporting window: July 2025–June 2026 · Updated September 16, 2026

HISTORICAL ROUTE SIGNALGenerally reliable
72.8%arrived on time
16.3%30+ min late
2.0%cancelled
393scheduled flights
Based on July 2025–June 2026; on time means arrival less than 15 minutes late.
60+ minutes late9.7%all scheduled flights
120+ minutes late3.6%all scheduled flights
Diverted0.5%did not reach as scheduled
Average arrival+9.5 mincompleted flights

Which departure time was most reliable for FLL to ISP?

Among qualifying FLL-to-ISP departure window results, Early morning had the highest on-time rate: 87.7% of 195 flights. Afternoon was lowest at 49.1% across 57 flights.

Departure windowFlightsOn time30+ minCancelled
Early morning19587.7%6.2%2.1%
Late morning4470.5%9.1%0.0%
Afternoon5749.1%35.1%3.5%
Evening7660.5%26.3%1.3%

Which weekday was most reliable for FLL to ISP?

Among qualifying FLL-to-ISP weekday results, Wednesday had the highest on-time rate: 89.3% of 56 flights. Sunday was lowest at 50.0% across 54 flights.

DayFlightsOn time30+ minCancelled
Monday5962.7%22.0%6.8%
Tuesday5184.3%7.8%2.0%
Wednesday5689.3%7.1%0.0%
Thursday5373.6%15.1%0.0%
Friday5879.3%12.1%3.4%
Saturday6271.0%14.5%0.0%
Sunday5450.0%35.2%1.9%

Which airline was most reliable for FLL to ISP?

Only JetBlue Airways met the FLL-to-ISP airline threshold: 74.7% of 371 scheduled flights arrived on time during July 2025–June 2026.

AirlineFlightsOn time30+ minCancelled
JetBlue Airways37174.7%15.1%1.9%
Frontier Airlines1942.1%42.1%5.3%
Southwest Airlines333.3%0.0%0.0%

Which month was most reliable for FLL to ISP?

Among qualifying FLL-to-ISP month results, September 2025 had the highest on-time rate: 100.0% of 18 flights. March 2026 was lowest at 52.2% across 46 flights.

MonthFlightsOn time30+ minCancelled
July 20253183.9%6.5%0.0%
August 20253196.8%3.2%0.0%
September 202518100.0%0.0%0.0%
October 20252190.5%0.0%0.0%
November 20253369.7%15.2%0.0%
December 20254660.9%30.4%2.2%
January 20263658.3%22.2%8.3%
February 20263167.7%6.5%6.5%
March 20264652.2%30.4%4.3%
April 20263063.3%30.0%0.0%
May 20263174.2%12.9%0.0%
June 20263987.2%12.8%0.0%

What drove FLL to ISP delay minutes?

Late aircraft was the largest recorded FLL-to-ISP delay category, accounting for 53.9% of 6,068 BTS-attributed delay minutes during July 2025–June 2026.

Airline31.7%
Late aircraft53.9%
National airspace12.9%
Weather1.2%
Security0.3%
This is historical evidence, not a forecast.

Weather, schedules and operations change. For a trip you have already booked, use the airline or airport for live status.